Are any PMs compatible with recumbent bikes? I may be looking that direction following prostate surgery in a few months.
My PowerTap Pro is laced into a 700c, but it would seem it should work with a recumbent too. I'm not sure about an Ergomo - maybe depends on the specific BB used in the recumbent.
My brother has been running power taps on his (Bacchetta) recumbent for several years. 135 spacing no problem, Saris sells an axle kit to get 135 (mainy for mtb use). Wheel size does not impact PM use.